Rudolf chilling-worth



(NoModeL) R. GHILLINGWORTH.

MEANS FOR FORMING BRANCHES UPON WROUGHT METAL TUBES. N0. 596,770.

Patented Jan. 4,1898.

km W W UNITED STATES PATENT EEicE.

RUDOLF CHILLINGNVORTl-I, OF NUREMBERG, GERMANY, ASSIGNOB TO THE STANDARD\VELDLESS TUBE AND CYCLE COMPONENTS, LIMITED, OF

LONDON, ENGLAND.

MEANS FOR FORMING BRANCHES UPON WROUGHT-METAL TUBES.

SPECIFICATION forming part of Letters Patent No. 596,770, dated January4, 1898.

Application filed August 4, 1896. herial No. 601,628. (No model.)Patented in Germanyhpril 6, 1895,1To. 84,352; in Austria April 20,1895,17). 45/2,809; in England April 23, 1895, No. 8,050; in France July1 1895,11). 248,564, and in Belgium March 11, 1896,1l'm120fl02;

To 0.56 10720722, it nuty concern..-

Be it known that I, RUnoLF CHILLING- WORTH, asubject of the Emperor ofGermany, residing at Nuremberg, Germany, have invented an Improvement inMeans for Forming Tubular Branches upon iVrought-Metal Tubes, of whichthe following is a specification.

This invention has been patented in Great 1o Britain April 23, 1895, No.8,050; in Germany April 6, 1895, No. 84,352; in Austria April 20, 1895,No. 45/2,?309; in France July 1, 1895, No. 2%,564, and in Belgium March11, 1896, No. 120,302.

Efiorts have been made to manufacture tubes with tubular branches bymaking a hole in the tube, placing the tube in a die, and drawingthrough the hole a conical spreader for distending the metal. Thesedevices are difficult to manipulate and the metal is liable to becomechilled.

In the present improvement I provide a series of dies and punchesadapted to act instantaneously upon the wrought-metal tube 2 5 and todevelop and complete the branch by a series of operations, ashereinafter described.

In the drawings, Figure 1 represents the wrought-metal tube. Fig. 2shows the first operation thereon. Fig. 3 is a cross-section 0 of thedevices shown in Fig. 2, together with the external die. Fig. trepresents the teat with the die for making a hole in the same. Fig. 5shows a finishing operation by which the branch tube is brought to itsultimate shape. Fig. 6 shows a tube With four tubular branches orsockets upon the same, and

Fig. 7 is a cross-section of Fig. -6.

, It is to be understood that any desired number of tubular branchesmay. be formed upon a wrought-metal tube and in the relative positionsdesired, the completed article (illustrated in Figs. 6 and 7)representing the crankshaft tube for a bicycle-frame.

The tube r is subjected to the action of the punch 13, supported by acore or' mandrel a, within the tube, there being a die b upon theoutside of the tube acting in connection with the punch b to produce ateat c in the desired position on the tube. In this operation the metalof the tube 0' is stretched so that the thickness of the teat c is notmaterially lessened and, if desired, the teat 0 may be still furtherelongated by the action of a second punch and its die. The end of theteat is now opened by forminga hole therein, as illus- 5 5 tratedin Fig.4. This may be punched in any desired manner and advantageously by thepunch c and die 0 The tube with the open-ended teat is now subjected tothe action of a punch Z2, (shown in Fig. 5,) which is of a shapecorresponding to the desired shape of the interior of the tubularbranch,and

an exterior die 5 acting in conjunction with the punch, gives to thebranch and to the tube '1" adjacent to the branch the proper shape forthe completed article.

It is advantageous to'provide abase to the punch 12, as represented inFig. 5, such base being received into a recess in the mandrel or core 0.so that the same mandrel or core may be used with dilferent punches.

It is to be understood that if the tube r is bent or otherwise misshapedin the formation of the tubular branches it can be straightened outduring the last operation. The tube of wrought metal with the fourtubular sockets or branches is represented in Fig. 6, and a section ofthe same is shown in Fig. 7; but the number of tubular branches orsockets may vary.

I claim as my invention-- In the manufacture of wrought-metal tubes withtubular branches,a mandrel adapted to pass into the tube and a punchsupported thereby and acting within the tube, and an external diecooperating with the punch for pressing up a teat, means for forming ahole through the end of the teat and an internal punch, and an externaldie for giving the final shape to the tube and to the open tubular obranch, substantially as specified.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

RUDOLF GHILLINGIVORTH.

Witnesses ANDREAS STICH, OSCAR 13001:.

